Add override of download location.

Add ability to override download location by setting
environment variable ANDROID_REPOSITORY.

Author: Greger Stolt Nilsen

emu/emu_downloads_menu.py

@@ -27,15 +27,17 @@
 from emu.utils import download
 from emu.docker_config import DockerConfig
 
+ANDROID_REPOSITORY = os.environ.get("ANDROID_REPOSITORY", "https://dl.google.com/")
+
 SYSIMG_REPOS = [
-    "https://dl.google.com/android/repository/sys-img/android/sys-img2-1.xml",
-    "https://dl.google.com/android/repository/sys-img/google_apis/sys-img2-1.xml",
-    "https://dl.google.com/android/repository/sys-img/google_apis_playstore/sys-img2-1.xml",
-    "https://dl.google.com/android/repository/sys-img/google_atd/sys-img2-1.xml",
-    "https://dl.google.com/android/repository/sys-img/android-tv/sys-img2-1.xml",
+    f"{ANDROID_REPOSITORY}/android/repository/sys-img/android/sys-img2-1.xml",
+    f"{ANDROID_REPOSITORY}/android/repository/sys-img/google_apis/sys-img2-1.xml",
+    f"{ANDROID_REPOSITORY}/android/repository/sys-img/google_apis_playstore/sys-img2-1.xml",
+    f"{ANDROID_REPOSITORY}/android/repository/sys-img/google_atd/sys-img2-1.xml",
+    f"{ANDROID_REPOSITORY}/android/repository/sys-img/android-tv/sys-img2-1.xml",
 ]
 
-EMU_REPOS = ["https://dl.google.com/android/repository/repository2-1.xml"]
+EMU_REPOS = [f"{ANDROID_REPOSITORY}/android/repository/repository2-1.xml"]
 
 CHANNEL_MAPPING = {
     "channel-0": "stable",
@@ -161,10 +163,7 @@ def __init__(self, pkg, licenses):
             url_element = pkg.find(".//url")
         self.zip = url_element.text
 
-        self.url = "https://dl.google.com/android/repository/sys-img/%s/%s" % (
-            self.tag,
-            self.zip,
-        )
+        self.url = f"{ANDROID_REPOSITORY}/android/repository/sys-img/%s/%s" % (self.tag, self.zip)
 
     def short_tag(self):
         return self.SHORT_TAG[self.tag]
@@ -214,7 +213,7 @@ def __init__(self, pkg, licenses):
         for archive in archives:
             url = archive.find(".//url").text
             hostos = archive.find("host-os").text
-            self.urls[hostos] = "https://dl.google.com/android/repository/%s" % url
+            self.urls[hostos] = f"{ANDROID_REPOSITORY}/android/repository/{url}"
 
     def download_name(self):
         return "emulator-{}.zip".format(self.version)

emu/platform_tools.py

@@ -11,18 +11,18 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+import os
 import zipfile
 from pathlib import Path
 
 from emu.utils import download
 
-
 class PlatformTools(object):
     """The platform tools zip file. It will be downloaded on demand."""
 
     # Platform tools, needed to get adb.
     PLATFORM_TOOLS_URL = (
-        "https://dl.google.com/android/repository/platform-tools_r29.0.5-linux.zip"
+        f'{os.environ.get("ANDROID_REPOSITORY", "https://dl.google.com")}/android/repository/platform-tools_r29.0.5-linux.zip'
     )
     PLATFORM_TOOLS_ZIP = "platform-tools-latest-linux.zip"